Carton blank portion



FIG. 1 is an outside plan view of a carton blank portion showing our new design in a first environment; and

FIG. 2 is an inside plan view thereof.

FIG. 3 is an outside plan view of a carton blank portion showing our new design in a second environment; and,

FIG. 4 is an inside plan view thereof.

The uneven-length broken line surrounding the shaded region in each of FIGS. 1-4 represents an unclaimed boundary of the claimed design. The arrow shaped feature within the shaded region is an opening in the carton blank portion. The even-length broken lines within the shaded region are lines of partial cuts in the carton blank portion. The even-length broken lines outside the shaded region in FIGS. 1 and 2 show peripheral edges, panel crease lines and lines of partial cuts within panels in a first carton blank, are for environmental purposes only, and form no part of the claimed design. The even-length broken lines outside the shaded region in FIGS. 3 and 4 show peripheral edges, panel crease lines and lines of partial cuts within panels in a second carton blank, are similarly for environmental purposes only, and similarly form no part of the claimed design. 

The ornamental design for a carton blank portion, as shown and described. 